Ok Streets ol' friend, I have a question for you. What is "Line Boring" and what advantage is it.

Does it have to do with blue printing an engine?

I have done several stock rebuilds in my day but always picked up the short blk's already assembled to get the warrenty's. This time I am planning and building this one myself and I am just trying to learn so I hope you all don't mind all the dumb questions.
The more I listen to you all, the more I am getting convinced that 400+ HP out of my 400sbc is no problem.